Shield conducting path

ABSTRACT

A shield conducting path of the present invention includes a plurality of electric wires which is formed by enclosing electric conductors with insulation coatings, and a metallic pipe which protects and shields the electric wires by inserting them therethrough. The pipe has a tube main body which has a tubular shape and through which the electric wires are inserted, and a partition wall which is extended from an inner wall of the tube main body and partitions an inner portion of the tube main body. The present invention is characterized in that the partition wall has a cross section of a curved shape or a bent shape when cut in a direction orthogonal to an axial direction of the tube main body.

TECHNICAL FIELD

The present invention relates to a shield conducting path.

BACKGROUND ART

Conventionally, there has been known a shield conducting path configured to protect and shield an electric wire by inserting a plurality of non-shielded electric wires into a pipe made of a metal (for example, see Patent Document 1).

Patent Document 1: Japanese Patent No. 3909763

DISCLOSURE OF THE INVENTION Problem to be Solved by the Invention

In a vehicle such as a hybrid motor vehicle, plural types of electric wires, such as a power electric wire, through which a high voltage and large current flows, an electric wire of a weak current system and the like are arranged. At this point, for example, in the case that the power electric wire and the electric wire of the weak current system are inserted into a same pipe, it is necessary to insert them into the pipe after applying a shield, such as a braided wire, to the electric wire of the weak current system to prevent an influence of an electromagnetic noise generated by the power electric wire. Therefore, there is a problem that the number of the parts used is increased and it takes labor in processing.

As a result of studying the problem, it was found that the above problem can be solved by dividing an inner portion of the pipe into two or more sections by a flat partition wall. However, there has been a problem that, when a bending processing is applied to from the pipe having the above structure into a shape which is suited to an arranged position, the partition wall serves as a beam and it is hard to deform the pipe to an intended shape.

The present invention is completed on the basis of the circumstances above, and an object of the present invention is to provide a shield conducting path which allows insertion of plural types of electric wires therethrough, and is processed easily into a desired shape.

Means for Solving the Problem

The present invention is a shield conducting path including a plurality of electric wires each of which is formed by enclosing an electric conductor with an insulation coating, and a metallic pipe which protects and shields the electric wires by inserting them therethrough. The shield conducting path has a tube main body which has a tubular shape and through which the electric wires are inserted, and a partition wall which is extended from an inner wall of the tube main body and partitions an inner portion of the tube main body. The partition wall has a cross section of a curved shape or a bent shape when cut in a direction orthogonal to an axial direction of the tube main body.

In the present invention, since the inner portion of the tube main body of the pipe is partitioned by the partition wall, it is possible to insert the plural types of electric wires without applying any shield, and it does not take labor in processing.

Further, in the present invention, since the cross section of the partition wall partitioning the tube main body is curved or bent, it is easily deformed. As a result, according to the present invention, it is possible to insert the plural types of electric wires, and it is also possible to provide a shield conducting path which can be easily processed into a desired shape.

It is preferable that the present invention is structured as follows.

When it is structured such that a clearance is provided between an insertion space which is enclosed by the inner wall of the tube main body and the partition wall and an outer peripheral surface of the insulation coating, the electric wire is not damaged when carrying out a bending processing on the shield conducting path.

When it is structured such that the partition wall is formed line symmetrically or point symmetrically, or otherwise is configured by a plurality of partition parts which is of the same shape and extended from the inner wall of the tube main body to an axial center of the tube main body and are arranged in the inner wall of the tube main body so as to be spaced at even intervals, the partition wall is bent easily. Therefore, it becomes easier to process into the desired shape.

Effect of the Invention

According to the present invention, it is possible to provide the shield conducting path which allows insertion of the plural types of electric wires therethrough and is processed easily into a desired shape.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross sectional view of a shield conducting path according to a first embodiment;

FIG. 2 is a cross sectional view of a shield conducting path according to a second embodiment; and

FIG. 3 is a cross sectional view of a shield conducting path which is described in the other embodiment (1).

DESCRIPTION OF REFERENCE NUMERALS

-   10: Shield conducting path -   11: First electric wire (electric wire) -   12: Electric conductor -   13: Insulation coating -   21: Second electric wire (electric wire) -   22: Electric conductor -   23: Insulation coating -   30: Pipe -   31: Cylinder portion (Tube main body) -   31A: Inner wall -   Y: Axial center of cylinder portion -   32: Partition wall -   34: First insertion space (Insertion space) -   35: Second insertion space (Insertion space) -   36: Clearance -   37: Clearance -   83: Partition part

BEST MODE FOR CARRYING OUT THE INVENTION First Embodiment

A description will be given of a first embodiment obtained by embodying the present invention with reference to FIG. 1. A shield conducting path 10 according to the first embodiment is structured such that it is arranged between devices (not illustrated), for example, a battery, an inverter, a motor constituting a power source of a hybrid motor vehicle for driving and two types of non-shielded type electric wires 11 and 21 are inserted into a pipe 30 which includes a batch shielding function and an electric wire protecting function.

In the present embodiment, three electric wires arranged in an insertion space 34 (details of which are described later) on a right side of FIG. 1 are first electric wires 11, four electric wires arranged in an insertion space 35 on a left side of FIG. 1 are second electric wires 21. Hereinafter, these wires are collectively referred to as two types of electric wires 11 and 21.

The two types of electric wires 11 and 21 are different in cross sectional diameter, and the first electric wire 11 is larger than the second electric wire 21 in the cross sectional diameter. The two types of electric wires 11 and 21 are respectively structured such that outer peripheries of electric conductors 12 and 22 which are made of a metal (for example, an aluminum alloy, an aluminum, a copper, a copper alloy or the like) are enclosed by insulation coatings 13 and 23 which are made of a synthetic resin.

Each of the electric conductors 12 and 22 of the two types of electric wires 11 and 21 is formed of a rod-like single core wire or a strand wire which is obtained by spirally bundling a plurality of thin wires, and is shaped to have an approximately circular cross section. The insulation coatings 13 and 23 are also shaped to have an approximate circle cross section on their outer periphery, in the same manner as the electric conductors 12 and 22.

The pipe 30 is made of a metal (for example, an aluminum alloy, a copper alloy or the like), and has a cylinder portion 31 (corresponding to a tube main body 31) which is formed to have an approximately circular cross section, and a partition wall 32 which is extended from an inner wall 31A of the cylinder portion 31 so as to partition an inner portion 31B of the cylinder portion 31. The cylinder portion 31 and the partition wall 32 are integrally formed by extrusion molding.

In this case, the partition wall 32 is formed over an entire length of the pipe 30, passes through an axial center Y of the cylinder portion 31 from one end portion of an inner peripheral surface (an inner wall) of the cylinder portion 31, and is formed over an inner peripheral surface which faces the one end portion. The partition wall 32 has a cross section which is curved like a sine curve in a direction orthogonal to an axial direction of the cylinder portion 31, as shown in FIG. 1. The partition wall 32 has a cross section which is approximately point symmetrical with respect to the axial center Y of the cylinder portion 31.

The inner portion 31B of the cylinder portion 31 is partitioned into two insertion spaces 34 and 35 by the partition wall 32. Each of the insertion spaces 34 and 35 is a space which is enclosed by the inner wall 31A of the cylinder portion 31 and the partition wall 32. The first electric wire 11 and the second electric wire 21 are inserted into the insertion spaces 34 and 35 respectively from an opening in one end side of the pipe 30. In the present embodiment, the insertion space 34 on a right side in Figure through which the first electric wire 11 is inserted is the first insertion space 34, and the insertion space 35 on a left side in Figure through which the second electric wire 21 is inserted is the second insertion space 35. Hereinafter, these two insertion spaces are collectively refereed to as the insertion spaces 34 and 35.

There are clearances 36 and 37 between the insulation coating 13 of the inserted first electric wire 11 and the first insertion space 34 and between the insulation coating 23 of the inserted second electric wire 21 and the second insertion space 35, respectively.

Next, a description will be given of an operation and an effect of the present embodiment.

The two types of electric wires 11 and 21 are inserted into the inner portion 31B of the cylinder portion 31 of the pipe 30 when manufacturing the shield conducting path 10 according to the present embodiment. Three first electric wires 11 are inserted into the first insertion space 34 from the opening in the one end side of the pipe 30, and four second electric wires are inserted into the second insertion space 35. In the present embodiment, since the inner portion 31B of the cylinder portion 31A of the pipe 30 is partitioned by the partition wall 32, it is not necessary to apply any shield when inserting the two types of electric wires 11 and 21. Therefore, it does not take labor in processing and the number of the parts used is not increased. The insertion space is reduced by the partition wall, a surface area contacting with the electric wire is increased. Therefore, there is an effect that a heat generated by the electric wire is discharged.

When arranging the shield conducting path 10 according to the present embodiment which is manufactured as mentioned above, it is deformed into a shape which is suited to the arranged position. In the present embodiment, since the cross section of the partition wall 32 partitioning the cylinder portion 31 is curved, it is easy to deform the shielded conducting path 10.

Particularly, in the present embodiment, since the clearances 36 and 37 are provided between the first and second insertion spaces 34 and 35 and the outer peripheral surfaces of the respective insulation coatings 13 and 23 of the two types of electric wires 11 and 21, a bending processing can easily be carried out without damaging the insulation coatings 13 and 23 of the electric wires 11 and 21. Further, since the cross sectional shape of the partition wall 32 is formed point symmetrically the partition wall 32 is easily bent, and therefore can be more easily processed into a desired shape.

As mentioned above, according to the present embodiment, it is possible to provide the shield conducting path 10 which allows insertion of the plural types of electric wires 11 and 21 therethrough, and can be processed easily into a desired shape.

Second Embodiment

A description will be given of a second embodiment obtained by embodying the present invention with reference to FIG. 2. A shield conducting path 40 according to the present embodiment is structured so as to be arranged between devices (not illustrated) in the same manner as the first embodiment, and is structured such that three types of non-shielded type electric wires 51, 61 and 71 are inserted into a pipe 80 having a batch shielding function and an electric wire protecting function.

In the present embodiment, one electric wire arranged in an insertion space 84 (details of which are mentioned later) on an upper side of FIG. 2 is a third electric wire 51, two electric wires arranged in an insertion space 85 on a right lower side of FIG. 2 are a fourth electric wire 61, four electric wires arranged in an insertion space 86 on a left lower side of FIG. 2 are fifth electric wires 71. Hereinafter, these electric wires are collectively referred to as three types of electric wires 51, 61 and 71.

The three types of electric wires 51, 61 and 71 are different in their cross sectional diameter, and the cross sectional diameter is larger in the order of the third electric wire 51, the fourth electric wire 61 and the fifth electric wire 71. The three types of electric wires 51, 61 and 71 are respectively structured such that outer peripheries of electric conductors 52, 62 and 72 which are made of a metal (for example, an aluminum alloy, an aluminum, a copper, a copper alloy) are enclosed by insulation coatings 53, 63 and 73, which are made of a synthetic resin.

Each of the electric conductors 52, 62 and 72 of the three types of electric wires 51, 61 and 71 is formed of a rod-like single core wire or a stranded wire which is obtained by spirally bundling a plurality of thin wires, and is shaped to have an approximately circular cross section. The insulation coatings 53, 63 and 73 have a cross section which is approximately circular in the on their outer periphery, in the same manner as the electric conductors 52, 62 and 72.

The pipe 80 is made of a metal (for example, an aluminum alloy, a copper alloy or the like), and has a cylinder portion 81 (corresponding to a tube main body 81) which is formed to have an approximately circular cross section, and a partition wall 82 which is extended from an inner wall 81A of the cylinder portion 81 so as to partition an inner portion 81B of the cylinder portion 81. The cylinder portion 81 and the partition wall 82 are integrally formed by extrusion molding.

The partition wall 82 is formed over an entire length of the pipe 80, is configured by three partition parts 83, 83 and 83 which are formed into a circular arc shape and extended from the inner wall 81A of the cylinder portion 81 to an axial center Z of the cylinder portion 81. The partition wall 82 has a cross section of a curved shape when cut in a direction orthogonal to an axial direction of the cylinder portion 81 as shown in FIG. 2. The extended ends (the end portions in the side of the axial center Z) of three partition parts 83, 83 and 83 are connected to each other and integrated in the axial center Z of the cylinder portion 81. Further, the three partition parts 83, 83 and 83 have the identical shape and are arranged at an even pitch of 120 degrees in a peripheral direction of the inner wall 81A of the cylinder portion 81.

The inner portion 81B of the cylinder portion 81 is partitioned into three insertion spaces 84, 85 and 86 by the partition wall 82. Each of the insertion spaces 84, 85 and 86 is a space which is enclosed by the inner wall 81A of the cylinder portion 81 and the partition wall 82. The third electric wire 51, the fourth electric wire 61 and the fifth electric wire 71 are inserted respectively into the insertion spaces 84, 85 and 86 from an opening in one end side of the pipe 80. In the present embodiment, the insertion space 84 on an upper side of the drawing through which the third electric wire 51 is inserted is the third insertion space 84, the insertion space 85 on a right lower side of the drawing through which the fourth electric wire 61 is inserted is the fourth insertion space 85, the insertion space 86 on a left side of the drawing through which the fifth electric wire 71 is inserted is the fifth insertion space 86. Hereinafter these three insertion spaces are collectively referred to as the insertion spaces 84, 85 and 86.

There are clearances 87, 88, and 89 between the insulation coating 53 of the inserted third electric wire 51 and the third insertion space 84, between the insulation coating 63 of the inserted fourth electric wire 61 and the fourth insertion space 85, and between the insulation coating 73 of the inserted fifth electric wire 71 and the fifth insertion space 86, respectively.

Next, a description will be given of an operation and an effect of the present embodiment.

The three types of electric wires 51, 61 and 71 are inserted into the inner portion 81B of the cylinder portion 81 of the pipe 80 when manufacturing the shield conducting path 40 according to the present embodiment. A single third electric wire 51 is inserted into the third insertion space 84 from the opening in the one end side of the pipe 80, two fourth electric wires 61 are inserted into the fourth insertion space 85, and four fifth electric wires 71 are inserted into the fifth insertion space 86. In the present embodiment, since the inner portion 81B of the cylinder portion 81 of the pipe is partitioned by the partition wall 82, it is not necessary to apply any shield when inserting plural types of electric wires 51, 61 and 71. Therefore, it does not take labor in processing and the number of the parts is not increased.

When arranging the shield conducting path 40 according to the present embodiment which is manufactured as mentioned above, it is deformed into a shape suited to the arranged position. In the present embodiment, since the cross sectional shape of the partition wall 82 partitioning the cylinder portion 81 is formed in a curved shape, it is easily deformed.

Particularly, in the present embodiment, since the clearances 87, 88 and 89 are provided between the respective insertion spaces 84, 85 and 86 and the outer peripheral surfaces of the insulation coatings 53, 63 and 73 of the electric wires, a bending processing can easily be carried out, and it is processed into a desired shape more easily.

As mentioned above, according to the present embodiment, it is possible to provide the shield conducting path 40 which allows insertion of three types of electric wires 51, 61 and 71, and can easily be processed into a desired shape.

Other Embodiments

The present invention is not limited to the embodiments which are described by the above descriptions and the drawings. However, for example, the following embodiments are included in the technical scope of the present invention.

(1) In the above embodiment, as the partition wall, there are shown the structure in which the cross sectional shape is curved and point symmetric, and the structure configured by a plurality of partition parts which is of the same shape and extended from the inner wall of the tube main body to the axial center of the tube main body and are arranged in the inner wall of the tube main body so as to be spaced at even intervals. However, the structure is not limited to this.

The structure of the partition wall may be optional as long as the cross section has a curved shape or a bent shape. For example, the partition wall may have a bent cross section as shown in FIG. 3. It is to be noted that the shield conducting path shown in FIG. 3 has the same structure as the shield conducting path according to the first embodiment except that the cross sectional shape of the partition wall is the bent shape.

Further, the partition wall maybe formed line symmetrically, a partition wall having a circular arc shaped cross section may be formed at a position which does not uniformly divide the inner portion of the tube main body, or a plurality of partition walls may be arranged. Further, the partition wall may be formed by arranging a plurality of partition parts of the same shape at uneven intervals. Further, the partition wall maybe formed by arranging a plurality of partition parts having different shapes at either even or uneven intervals.

(2) In the above embodiment, the plural types (two types or three types) of electric wires are inserted into the insertion spaces of the tube main body by type. However, a plurality of electric wires of the same type may be inserted separately into a plurality of separate insertion spaces.

(3) The cross sectional shape of the pipe may be an approximate oval or an approximate polygon instead of a approximate circle.

(4) The metal pipe may be formed by welding in addition to the structure which is integrally formed by extrusion molding.

(5) A wire rod such as an optical fiber or the like may be additionally inserted into the pipe.

(6) The cross section of the electric wire may be formed into a flat shape, an approximately oval shape, an approximately elliptic shape, an approximately rectangular shape and the like in addition to the approximately circular shape.

(7) The diameter of the cross section of the inserted electric wire may be the same or about the same. 

1. A shield conducting path comprising: a plurality of electric wires each of which is formed by enclosing an electric conductor with an insulation coating; and a metallic pipe which protects and shield the electric wires by inserting them therethrough, wherein the pipe has a tube main body which has a tubular shape and through which the electric wires are inserted, and a partition wall which is extended from an inner wall of the tube main body and partitions an inner portion of the tube main body, and wherein the partition wall has a cross section of a curved shape or a bent shape when cut in a direction orthogonal to an axial direction of the tube main body.
 2. The shield conducting path as according to claim 1, wherein there is a clearance between an insertion space enclosed by the inner wall of the tube main body and the partition wall and an outer peripheral surface of the insulation coating.
 3. The shield conducting path according to claim 1, wherein the partition wall is formed line symmetrically or point symmetrically, or is configured by a plurality of partition parts which is of the same shape and extended from the inner wall of the tube main body to an axis of the tube main body and are arranged in the inner wall of the tube main body so as to be spaced at even intervals.
 4. The shield conducting path according to claim 2 wherein the partition wall is formed line symmetrically or point symmetrically, or is configured by a plurality of partition parts which is of the same shape and extended from the inner wall of the tube main body to an axis of the tube main body and are arranged in the inner wall of the tube main body so as to be spaced at even intervals. 